Method and apparatus for a self-focusing camera and eyeglass system

ABSTRACT

An involuntary action adjusted by the accommodation of the crystalline lens of the eye provides the data to the embedded algorithm to get the new image. Instead of the user performing a voluntary action to control the embedded algorithm, an involuntary action by the user is used to control the embedded algorithm allowing the user to automatically adjust the Plane of Depth (POD) for a Light Field Photograph (LFP) image or an eyeglass image. The adjustment of eyeglass image is used by an accommodation system to control the mechanical system of lenses in an eyeglass to automatically focus the glasses over a range of PODs. In addition, a voluntary far/near button can be used manually to adjust the POD for both the LFP image and the eyeglass adjustment. The variation of the crystalline thickness to adjust the focus of nearby and distant objects is called accommodation.

BACKGROUND OF THE INVENTION

Portable wireless units (cellphones, smartphones, etc.) are offering theuser with easy access to others users via multimedia, text, voice,images or videos. Similarly, the wireless systems interconnect to theInternet to store these components on a server. The camera on thesewireless systems have been employed to store and/or send multimedia,photos and video for postings on the web, sharing with other users, orfor personal perusal for a later date.

The camera typically shows an image that is focused at a particulardepth. The other Plane of Depths (POD) in the Field of View (FOV) areout of focus. This photograph has been the mainstream of images andforms the basis of videos where one image after another is shown insequence to present a moving image to the viewer or user. The focus ofdepth set by the photographer or movie producer and the user basicallyhas no input to seeing the image or video at another POD.

Some smart phones provide a camera that captures still pictures or video(movies). Some wireless phones offer only one camera per wireless systemtypically located on the opposite side of the display screen. A cameracan be as simple as a pinhole and image sensor or the pinhole can bereplaced with a main lens. However, as the cost of the camera has beendecreasing, a second camera has been placed on the same side as thedisplay screen. These two cameras are typically on the reverse sides ofthe smart phone where the user can switch between the capture of imagesor video on either side of the smart phone.

Plenoptic cameras offer an ability to take a picture of a setting andrefocus the image of the setting to a different POD using the originalLight Field Photograph (LFP) image. A plenoptic camera comprises of amicrolens array and at least one image sensor array. Each microlenscaptures all the light in its field of view (FOV) that arrives along therays entering that particular microlens. The microlenses is placed in anarray of 4×4, 6×6, 20×20, etc. Since each microlens is displaced fromanother in the array, each microlens captures all the light of aslightly different FOV or different viewpoint. Thus, the light strikingone region of the microlenses array is different than the light strikinganother region of the microlenses array. The light information capturedby the image sensor array due to a plurality of microlenses can bestored in memory. A computer algorithm can be developed to manipulatethe light information retrieved from memory to generate how the imagewould appear when viewed from a different viewpoint. These differentviewpoints can provide images having different POD while still using theoriginal LFP image. The microlenses can be located between a main lensand the image sensor array. Several known software tools based on thecomputer algorithm, hereinafter called “embedded algorithm”, can bemanipulated to alter the POD of the LFP image dynamically without theneed to take another LFP image.

The image taken by the plenoptic camera contains all the information fordifferent PODs to be displayed by using the embedded algorithm.Currently, the embedded algorithm provides a slider bar on a displayscreen for the user to vary the slider to see the different PODs.Instead of using a slider bar, the user may need to enter data to alterthe image. In either case, the user must perform a voluntary action inconjunction with the embedded algorithm to get the new image.

BRIEF SUMMARY OF THE INVENTION

Smart phones usually have at least one camera. The inventive techniqueis to place at least one plenoptic camera on the smart phone and use thealgorithm to adjust (embedded algorithm-adjusted) an LFP image to adifferent POD. The image taken by the plenoptic camera contains all theinformation for different PODs to be displayed. This embedded algorithmmanipulates the original LFP image via a user to alter the POD. Thecomputer algorithm is embedded in the electronics system 20-12illustrated in FIG. 20.

One of the inventive embodiments of this invention is for the user touse what is typically an involuntary action, the accommodation of thecrystalline lens of the eye, to provide the data to the embeddedalgorithm to get the new image. Thus, instead of the user performing avoluntary action to control the embedded algorithm, an involuntaryaction by the user is used to control the embedded algorithm. Thisallows the user to automatically adjust the POD of an LFP image. Thisembedded algorithm is controlled by measuring the crystalline len'sthickness of the user as the user attempts to focus on a different POD.The crystalline lens thickness variation, δT, can be used to determinewhether to focus nearer or further. If the thickness decreases then thecrystalline lens is decreasing in thickness; therefore, the user isfocusing at a further object. If the thickness increases then thecrystalline lens is increasing in thickness, therefore, the user isfocusing at a nearer object. The variation of the crystalline thicknessto adjust the focus of nearby and distant objects is calledaccommodation.

Another preferred embodiment of the invention is to use the crystallinelens thickness variation, δT, to automatically adjust the focus ofadjustable focus eyeglasses. As the accommodation is measured, thevariation of the crystalline thickness is used to automatically adjustthe focus of the eyeglasses by providing data input to a μControllerwhich in turn automatically controls a mechanical device to adjust thefocus of the eyeglasses. When the user adjusts their focus on nearerobjects, the eyeglasses follow suit and adjust the lenses of theeyeglasses to focus on the nearer object accordingly. When the useradjusts their focus on farther objects, the eyeglasses follow suit andadjust the lenses of the eyeglasses to focus on the farther objectaccordingly.

Another preferred embodiment of the invention is an accommodation testsystem which measures the accommodation from a POD focused at infinityto a POD focused at the minimum distance. The test LFP image presentedto the user has PODs at known depths (∞, 100 m, 64 m, 32 m, 16 m, 8 m, 4m, 2 m, 1 m, 0.75 m, 0.5 m, 0.25 m, etc.), for example. For eachmeasurement, the T is measured, the δT can be calculated, while the PODis read from the stimulus. The results are stored in a memory array andused to generate an accommodation table. This accommodation table can beused by the user as a reference model when the user focuses on differentPODs of various LFP images. The values in the table can be interpolated.

Short distance (width of the microlenses array) 3-D images or videosoccur with a single plenoptic camera. The imaging capabilities of thiscamera allow a single image to be taken after which the image can bepost-processed by the embedded algorithm to recreate an image focused atanother Plane of Depth (POD). The image is not retaken; instead, theoriginal image contains the information to be focused at various Planesof Depth (POD). This image is called a short range 3-D image since theimage comprises 3-D information based on the width or distance betweenthe furthest camera microlens within the single plenoptic camera.

Long distance 3-D images or videos occur with at least two plenopticcameras. The imaging capabilities of these cameras which each generate asingle image allow these images to be post-processed by the embeddedalgorithm to recreate two final images focused at any desired POD. Thetwo images are not retaken instead the original two images contains allthe information so that the embedded algorithm can be used to focusedthe original images to similar planes of depth. These images are calleda long range 3-D image since the images comprise 3-D information basedon the distance between the two plenoptic cameras within the system.

A preferred embodiment of the invention is the apparatus comprisingimage sensors placed on the same side of a smart phone offering thecapture of a long range 3-D picture or video. The image sensors in thecamera can be manufactured in CMOS or CCD. These sensors comprise twoplenoptic cameras placed on the same side where the embedded algorithmcan be used to re-focus the captured long range 3-D image or long range3-D video of different objects at various depth parallel planes. Thesecameras can be placed apart from one another as far as possibleincreasing the baseline. For the case of two plenoptic cameras, thedisplacement distance of the plenoptic cameras is equal to the averagedistance of between a user's eyes.

Another preferred embodiment of the invention is the apparatuscomprising more than two cameras or plenoptic cameras placed on the sameside to provide several different prospectives of a long range 3-D viewfrom different angles. These cameras can be placed apart from oneanother as far as possible increasing the baseline. The long range 3-Dview can be selected from the image captured by two or more of theplenoptic cameras.

Another preferred embodiment of the invention is the apparatuscomprising the two plenoptic cameras includes at least two visual eyeports the user can view to see a playback of the recorded image orvideo. The image or video is a long range 3-D image or video since thereis more than one plenoptic camera, each separated by baseline distanceslarger than the radius of each plenoptic camera. The imagereconstruction apparatus can be formed from an LCD display withbacklight illumination, an LED display with the three primary colors,laser scanning on the cornea, etc. and can be housed in the apparatus.The image reconstruction apparatus is located within the eye portsallowing the user to view a long range 3-D image or a video generated bythe long range 3-D system of the camera or video ported to the smartphone via an external source. The smart phone with the long range 3-Dcamera system can be used to film videos or stills and the LCD displaycan be used to view the long range 3-D image or video results.

Another preferred embodiment of the invention is the apparatuscomprising at least one plenoptic camera which is used to capture theshort range 3-D image or video, the playback of the user using the LCDsor other image presentation apparatus (LEDs, backlit LCD, etc.) canmeasure the thickness of the user's optic lens in the eye. The thicknessmeasurement can be used to calculate the accommodation the eye wouldhave experienced. The accommodation data can automatically adjust theplayback of the short range 3-D image or video to focus where the useris currently concentrating. This can be done to a short range 3-D imagegenerated by a single plenoptic camera. The playback device senses thecharacteristics of the user's eyes and adjusts the short range 3-D imageor video to the correct depth plane. The thickness of the user'scrystalline lens measurement can be performed on the crystalline lens ofone eye and shared with the other eye (assuming both eyes have the samedepth characteristics) or can be performed on the crystalline lens ofboth right and left eye (specially tailored for each eye).

Another preferred embodiment of the invention is the apparatuscomprising the camera that sends the long or short range 3-D signal to apair of glasses with at least one projection system for each eyeglasslens. The camera captures the long or short range 3-D image andtransmits the data to the glasses for the user to see the long or shortrange 3-D image.

Another preferred embodiment of the invention is the apparatuscomprising at least one of the plenoptic cameras which can be displacedfrom the smart phone system and placed at a distance in order that thebaseline distance between two plenoptic cameras is increased. Theseparate camera units can automatically determine the distance from themain camera by portable wireless techniques (RF, infrared,electromagnetic radiation with a carrier signal, etc.). A gyro andaccelerometer placed within the displaced camera and the smart phone canbe used to determine the relative position to one another. Thisinformation can be used to improve the quality of the reconstructed longrange 3-D image or video.

Another preferred embodiment of the invention is the apparatuscomprising the separable plenoptic cameras attached to either the smartphone or to the eyeglasses. Separable units comprising plenoptic camerasand eye ports can be attached to either the smart phone or to theeyeglasses by a mating surface. These separable units can be wirelesscoupled to a remote device, to a remote display, to other separableplenoptic cameras, or to other eyeglasses. The separable units can bemated to an eyeglass and positioned over the eye or eyes of the user. Inaddition, these separable cameras can be electrically wired through themating device. The cameras can be placed at various distances apart fromanother offers greater flexibility in analyzing the depth of images.These images from these cameras are shared within the system. The smartphone can be in wireless contact with a remote system comprising anotherserver, the Internet, another smart phone, another camera system, or thecamera mounted on the eyeglass

Another preferred embodiment of the invention is the apparatuscomprising the camera and the attachable unit where each can each havetheir own power supply. When the attachable units are connected togethera single port can be used to charge both power supplies. Although, theattachable unit can be charged independently from the camera when not inphysical contact with the camera.

Another preferred embodiment of the invention is the apparatus andprocess for sharing long and short distance 3-D images between users.The first user takes an LFP image or video of an object using aplenoptic camera. The first user can focus the original LFP image usingthe crystalline lens measuring unit to any POD automatically or manuallyadjust the focus using a far/near button. In addition, the first usercan send the LFP image to a second user. The second users can perform aprocess to align their accommodation information versus the function ofthe POD. Then, the second user can view the LFP image and theircrystalline lens measuring unit can determine the POD being viewedsetting the accommodation value or do so manually using the far/nearbutton The accommodation value is sent to the first user who translatesthe second user's accommodation value into their accommodation value andobserves the final image being perceived by the second user.

Another preferred embodiment of the invention is the apparatus that usesa delay line to match the round trip transit from the electromagneticradiation source (LED) through the eye, bounce off the cornea, andreturn back to the source. This delay line can be matched to the user sothat the timing of the sub-p sec window can be determined in an A-D(Analog to Digital) converter. The extracted data is correlated to thecrystalline lens thickness and corresponding the accommodation of theeye. This information can then be used to autofocus an adjustablemechanical eyeglass system or be used to automatically focus an LFPimage to a different POD.

Another preferred embodiment is an accommodation test apparatuscomprising: a source configured to emit an electromagnetic radiation; acrystalline lens of an eye propagates the radiation emitted from thesource; a retina of the eye reflects the radiation in a direction of thecrystalline lens; the crystalline lens propagates the reflectedradiation from the retina; a detector configured to detect the reflectedradiation; a plurality of Plane of Depths (PODs) in an Light FieldPhotograph (LFP) image; and a time difference in propagation delay ismeasured between the lens focused on a plane focused at a first POD andthe lens attempting to focus on a second unfocused plane selected fromthe remaining plurality of PODs, further comprising: a laser to generatethe electromagnetic radiation, further comprising: at least one Schottkydiode to detect the reflected radiation. The apparatus, furthercomprising: a Light Field Photograph (LFP) image presents the focusedplane at the first POD and a plurality of unfocused planes from theremaining plurality of PODs, further comprising: an embedded algorithmapplies the time difference in propagation delay to an image processingsystem to focus the LFP image from the focused plane at the first POD tothe second unfocused plane of the LFP image selected from the remainingplurality of PODs. The apparatus, further comprising: an eyeglass imagegenerated by an eyeglass presents the focused plane at the first POD andthe second unfocused plane selected from the remaining plurality ofPODs, further comprising: an embedded algorithm applies the timedifference in propagation delay to a mechanical system to bring thesecond unfocused plane of the eyeglass image into focus.

Another preferred embodiment is a time difference apparatus comprising:a plurality of Plane of Depths (PODs) in a Light Field Photograph (LFP)image; a first thickness of a crystalline lens of an eye focused on afirst plane at a first POD; an electromagnetic radiation propagatesthrough the first thickness in a first measured delay time; wherein thecrystalline lens of the eye varies to a second thickness when attemptingto focus on a second unfocused plane selected from the remainingplurality of PODs; the electromagnetic radiation propagates through thesecond thickness in a second measured delay time; and the timedifference in propagation delay between the first measured delay timeand the second measured delay time indicates a POD variation, furthercomprising: a laser to generate the electromagnetic radiation, furthercomprising: at least one Schottky diode to detect the time difference inpropagation delay between the first measured delay time and the secondmeasured delay time, further comprising: the LFP image presents thefocused plane at the first POD and a plurality of unfocused planes fromthe remaining plurality of PODs, further comprising: an embeddedalgorithm applies the measured time difference to an image processingsystem to focus the LFP image of the second unfocused plane into focusby compensating for the POD variation. The apparatus, furthercomprising: an eyeglass image generated by an eyeglass presents thefocused plane at the first POD and the second unfocused planes at thesecond POD, further comprising: an embedded algorithm applies the PODvariation to a mechanical system to bring the second unfocused plane atof the eyeglass image into focus.

Another preferred embodiment is a method of using an accommodationsystem comprising the steps of: generating a Light Field Photograph(LFP) image with a Plane of Depth (POD) at infinity; presenting the LFPimage to a user; measuring a first time with the accommodation testsystem; storing the first time in a memory; attempting to focus on adifferent POD in the LFP image; measuring a second time with theaccommodation test system; calculating a time difference in propagationdelay between the second time and the first time and interpolating forthe different POD from an accommodation table; using an embeddedalgorithm to adjust the presented LFP image to focus on the differentPOD; and viewing the embedded algorithm-adjusted LFP image with thedifferent POD, further comprising the steps of: waiting a time periodbefore presenting the LFP image to the user, further comprising thesteps of: providing at least one plenoptic camera to generate the LightField Photograph (LFP) image, wherein the accommodation table storeseach of the values of T, δT, and POD, further comprising the steps of:issuing a strobe to a source and detector unit, further comprising thesteps of: coupling the embedded algorithm to an image processing system.

BRIEF DESCRIPTION OF THE DRAWINGS

Please note that the drawings shown in this specification may notnecessarily be drawn to scale and the relative dimensions of variouselements in the diagrams are depicted schematically. The inventionspresented here may be embodied in many different forms and should not beconstrued as limited to the embodiments set forth herein. Rather, theseembodiments are provided so that this disclosure will be thorough andcomplete, and will fully convey the scope of the invention to thoseskilled in the art. In other instances, well-known structures andfunctions have not been shown or described in detail to avoidunnecessarily obscuring the description of the embodiment of theinvention. Like numbers refer to like elements in the diagrams.

FIG. 1A shows the characteristics of a human eye with a probing beamused to measure the thickness of the crystalline lens corresponding to anon-accumulated condition using this inventive technique.

FIG. 1B depicts the characteristics of a human eye with a probing beamused to measure the thickness of the crystalline lens corresponding toan accumulated condition using this inventive technique.

FIG. 1C shows characteristics of a human eye with a probing beam used tomeasure the thickness of the crystalline lens and an LED projectionsystem using this inventive technique.

FIG. 1D illustrates characteristics of a human eye with a probing beamused to measure the thickness of the crystalline lens and a displayscreen system using this inventive technique.

FIG. 1E depicts characteristics of a human eye with a perpendicularprobing beam used to measure the thickness of the crystalline lens andlaser scanning system (Visual Retinal Display VRD) to write on thecornea using this inventive technique.

FIG. 1F shows characteristics of a human eye with a probing beam drivenby optical fibers used to measure the thickness of the crystalline lensand observing the image on a smart phone display using this inventivetechnique.

FIG. 2A depicts characteristics of a human eye with a probing beam usedto measure the thickness of the crystalline lens and a mechanicaleyeglass system that is automatically focused by the measured data usingthis inventive technique.

FIG. 2B shows the characteristics of a human eye with a probing beamused to measure the thickness of the crystalline lens and a fluidaltering lens system that is automatically focused by the measured datausing this inventive technique.

FIG. 3A illustrates a high speed microchip using Schottky diodes and alaser to measure the accommodation of the eye using this inventivetechnique.

FIG. 3B depicts a cross-sectional view of the FIG. 3A with the lasersolder bumped on the III-V die using this inventive technique.

FIG. 3C illustrates a cross-sectional view of the FIG. 3A with the lasersolder bumped on a III-V substrate which is solder bumped to the CMOSdie using this inventive technique.

FIG. 4 shows the circuitry and block diagrams used to measure the lensthickness corresponding to the accommodation variations and applies theresultant measurements to a light field photo or mechanical eyeglassesusing this inventive technique.

FIG. 5A depicts a microstrip design to perform the self-timing inaccordance with this inventive technique.

FIG. 5B illustrates a POD of an LFP image where the third plane from thefront is in focus in accordance with this inventive technique.

FIG. 5C shows a POD of an LFP image where the fourth plane from thefront is in focus in accordance with this inventive technique.

FIG. 6A depicts a flowchart to automatically test, measure, store, andretrieve T, δT, and POD and generate an Accommodation Table of a user'scrystalline lens viewing a Stored Image in accordance with thisinventive technique.

FIG. 6B illustrates a flowchart to automatically measure a user'scrystalline lens characteristics as the user focuses on different PODsin an image read from memory in accordance with this inventivetechnique.

FIG. 6C depicts a flowchart to automatically adjust the accommodation ofa light field photo in accordance with this inventive technique.

FIG. 6D illustrates a flowchart to automatically adjust the focusing ofmechanically or fluidly based eyeglasses illustrating this inventivetechnique.

FIG. 7A depicts the back of a smart phone (other examples: tablet,notebook, etc.) with a plenoptic camera and eye port in accordance withthe present invention.

FIG. 7B shows the front of a smart phone with a display screen and oneeye port in accordance with the present invention.

FIG. 7C depicts the back of a smart phone with two plenoptic cameras andtwo eye ports in accordance with this inventive technique.

FIG. 7D shows the front of a smart phone with a display screen and twoeye ports in accordance with the present invention.

FIG. 8A illustrates an example eye port system configured to receive,transmit and display images or videos using one plenoptic camera inaccordance with this inventive technique.

FIG. 8B depicts a two eye port system configured to receive, transmitand display images or videos using two plenoptic cameras in accordancewith the inventive technique.

FIG. 9A illustrates a flowchart performing accommodation and sharingimages or videos in accordance with this inventive technique.

FIG. 9B shows a flowchart performing long range 3-D accommodation andsharing long range 3-D images or long range 3-D videos in accordancewith this inventive technique.

FIG. 10A depicts eyeglasses with one plenoptic camera in communicationwith a network in accordance with the present invention.

FIG. 10B shows eyeglasses with two plenoptic cameras in communicationwith a network in accordance with the present invention.

FIG. 11A depicts glasses with one plenoptic camera in communication witha network and visual view of a display screen in accordance with thepresent invention.

FIG. 11B shows a guest in visual view of a display screen incommunication with a network in accordance with the present invention.

FIG. 12A depicts an example crystalline lens system configured toreceive, transmit and display images or videos using one plenopticcamera in accordance with the inventive technique.

FIG. 12B illustrates an example dual crystalline lens system configuredto receive, transmit and display images or videos using two plenopticcameras in accordance with this inventive technique.

FIG. 13A shows the back of a smart phone (other examples: tablet,notebook, etc.) with an attachable unit with plenoptic camera and eyeport in accordance with this inventive technique.

FIG. 13B depicts the front display screen of a smart phone with anattachable unit plenoptic camera and eye port in accordance with thepresent invention.

FIG. 13C shows the back of a smart phone with an attachable unit withtwo plenoptic camera and two eye ports in accordance with the presentinvention.

FIG. 13D illustrates the front display screen of a smart phone with anattachable unit with two plenoptic cameras and two eye ports and inaccordance with the present invention.

FIG. 14A shows the back of a smart phone and an attachable unitcomprising a plenoptic camera and eye port segregated in accordance withthe present invention.

FIG. 14B depicts the attachable unit comprising a plenoptic camera andeye port coupled to eyeglasses in accordance with the inventivetechnique.

FIG. 15A illustrates the back of a smart phone and an attachable unitcomprising two plenoptic cameras and two eye ports segregated inaccordance with this inventive technique.

FIG. 15B shows the attachable unit comprising two plenoptic cameras andtwo eye ports coupled to eyeglasses in accordance with this inventivetechnique.

FIG. 16 depicts the attachable unit comprising two plenoptic cameras andtwo eye ports coupled to eyeglasses with user viewing a display screenin accordance with the present invention.

FIG. 17A illustrates a smart phone (other examples: tablet, notebook,etc.) with user viewing through two eye ports in accordance with thepresent invention.

FIG. 17B depicts a smart phone with user viewing through two eye portsto two plenoptic cameras in accordance with the present invention.

FIG. 18A illustrates the back of a smart phone and two attachable unitseach comprising a plenoptic camera and an eye port, one in contact andthe other segregated from the wireless unit in accordance with thepresent invention.

FIG. 18B depicts the back of a smart phone and two attachable units eachcomprising a plenoptic camera and an eye port, one in contact and theother segregated from the wireless unit by a distance and wirelesslyconnected to wireless unit in accordance with the inventive technique.

FIG. 19A shows the back of a smart phone and two attachable units eachcomprising a plenoptic camera and an eye port, both segregated from thewireless unit by a distance and wirelessly connected to the wirelessunit in accordance with this inventive technique.

FIG. 19B shows the two attachable units each comprising a plenopticcamera and an eye ports coupled to glasses in accordance with thisinventive technique.

FIG. 20A shows a block diagram of a smart phone in accordance with thisinventive technique.

FIG. 20B shows a block diagram of an eyeglass in accordance with thisinventive technique.

FIG. 21 shows a hierarchal block diagram of an Electronics System inaccordance with this inventive technique.

FIG. 22 shows the manual control using an eye movement to adjust the PODin an LFP image in accordance with this inventive technique.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1A presents a pictorial of the right eye, an eyeglass, a source ofelectromagnetic radiation, a sensor of electromagnetic radiation, andcomponents of the right eye. The eye measuring system 1-33 comprises asource and a detector 1-8 of electromagnetic radiation to measure thetotal flight path of the electromagnetic radiation propagation. Theelectromagnetic radiation exits the source propagates in the right eye1-1 towards the blind point 1-3 and bounces off the blind point. Theincident electromagnetic radiation was reflected from the blind point onthe back surface of the eye 1-1 offering at least two advantages; 1) theposition of the transparent material 1-19 is located at what is known asbeing in the blind spot of the eye, a physical location outside the eyewhere the eye cannot sense the object; and 2) the incident radiationreflects off the surface of the blind point 1-3 on the backside of theeye 1-1 and since this blind point 1-3 does not have light gatheringrods or cones, the incident radiation is not sensed by the eye. Thelight rays from the blind spot enter the eye and land on the blind pointof the retina. The blind spot occurs because the blind point does nothave light detecting photoreceptive cells. As the electromagneticradiation passes through the right eye, the variation in index ofrefraction of the crystalline lens 1-2 causes a change in delay as thecrystalline lens 1-2 accommodates to various focus planes of depth. Thepropagation of the electromagnetic radiation leaves the source of thesource and detector 1-8 and propagates along the arrow 1-12. The lengthof propagation in free space is from the source of the source anddetector 1-8 the cornea 1-5. Once the radiation passes the cornea whichis a first focusing portion of the eye 1-1, the electromagneticradiation experiences an index of refraction of approximately 1.33 inthe cornea 1-5, experiences an index of refraction (n_(cl)) of 1.40propagating through the crystalline lens 1-1, experiences an index ofrefraction of approximately 1.33 in the vitreous humor before beingreflected from the blind point 1-3. At this point, the reflectedelectromagnetic radiation propagates back towards the source anddetector 1-8. The reflected ray 1-13 follows the same path as path 1-12except in reverse moving through the vitreous humor, through thecrystalline lens 1-2, through the cornea 1-5 and a distance ΔD throughfree space back to the source and detector 1-8. The distance through thecornea, the crystalline lens 1-2, and the vitreous humor until the rayhits the blind point is approximately 2.4 cm. The crystalline lens hasas a minimum thickness 1-10 when focusing at infinity or the lens iswithout accommodation. The source and detector 1-8 is a high-speedintegrated circuit that is able to distinguish differences in time inthe sub picosecond range. The source and detector 1-8 is shown mountedon an eyeglass 1-7. Although, the eyeglass has been indicated asrectangular in nature, the lens can be convex, concave, or mixture ofboth. Simultaneously, the right eye is viewing a projected image on theeyeglass along the optic axis 1-30 of the eye 1-1 which focuses theimage on the retina of the eye or a prism 1-31 is inserted in theeyeglass 1-7. Another possibility allows an image stimulus to beprovided in the LED or LCD source 1-32 that propagates in the eyeglassand reflects off the prism 1-31 and focuses on the surface of the retinaof the eye, collected by photoreceptors, and is sent to the brain by theoptic nerve 1-4. The first distance 1-11 through the eye along the opticaxis 1-30 the second distance 1-9 through free space after summation isalso about 2.4 cm.

The thickness variation of the crystalline lens 1-2 can be determined asthe eye accommodates to different PODs. When the eye is focused to a PODat infinity, the crystalline lens 1-2 has the minimum thickness 1-10.Under this case, the delay for the emitted ray 1-13 to leave this sourceof the source and detector 1-8 and for the reflected ray 1-12 to becaptured by the detector of the source and detector 1-8 has timeduration of T_(far).

In FIG. 1B, the right eye after full accommodation causes a POD closestto the eye 1-1 to be focused by the eye 1-1. The crystalline lens 1-2achieves the maximum thickness 1-14 using the involuntary ciliary musclecontrol to place the lens in a state of full accommodation. Thistechnique uses what is an involuntary muscle control of the crystallinelens 1-2 and lets the user partially control this involuntary musclecontrol. Under this case, the delay for the emitted ray 1-12 to leavethis source of the source and detector 1-8 and for the reflected ray1-13 to be captured by the detector of the source and detector 1-8 hastime duration of T_(near). T_(near) is typically greater than T_(far)since the crystalline lens 1-2 has increased in thickness under the casefor T_(near). Other than the crystalline lens thickness variation, allthe other dimensions of the eye 1-1 and free space remains the same. Thetime difference in propagation delay of T_(near) and T_(far) is themaximum δT variation and different time difference in propagation delay(δT) can be measured and stored in memory as the eye is focused throughdifferent POD's ranging from the POD at infinity to the POD at minimum.The time difference in propagation delay is also measured when the eyefocuses at a first POD and then the eye attempts to focus on a seconddifferent POD that is unfocused. A memory array holds the data and canbe used to generate the accommodation tables.

The electromagnetic radiation propagates through the thickness of thecrystalline lens 1-2 twice; the first case is towards the retina; andthe second case is away the retina. The measured time delay forelectromagnetic radiation to propagate through the crystalline lenscomprising the summation of the first and second case. This is calledthe measured delay time. This time only accounts for the time passagefor the electromagnetic radiation to propagate through the crystallinelens twice. This time does not account for the time to propagate in theVitreous Humor or free space.

The crystalline lens 1-2 has an index of refraction 1.40 while thecornea and the vitreous humor have an index of refraction ofapproximately 1.33 which is very close to that of water. The thicknessvariation between the crystalline lens 1-2 focused at a POD of infinityand the crystalline lens 1-2 focused at a minimum POD provides themaximum δT variation. Thus, the measurement of δT can be used inconjunction with the accommodation tables to determine the current PODbeing focused on. The source and detector 1-8 mounted on the eyeglass islocated within the dotted region 1-15. A perspective of the region 1-15along the line 1-16 will be illustrated in a later figure.

The round trip distance between the source and detector 1-8 and theblind point 1-3 of the eye remains constant. The crystalline lens 1-2during accommodation varies in thickness from 2.4 mm to 2.66 mm, or theΔ(0.26) mm, (for example, see: Kathryn Richdale, Mark A. Bullimore, andKarla Zadnik, “Lens Thickness with Age and Accommodation by OpticalCoherence Tomography”; Ophthalmic Physiol Opt. 2008 September; 28(5):441-447). The round trip make this Δ(0.52) mm or Δ(thickness)=0.52 mmand the estimated difference in time ΔT_(est) is:

$\begin{matrix}{{\Delta\; T_{est}} = \frac{{\Delta({thickness})}( {n_{cl} - n_{vh}} )}{c}} & (1)\end{matrix}$where c is the speed of light, n_(cl) is the index of refraction in thecrystalline lens and, n_(vh) is the index of refraction in the vitreoushumor. The estimated time is determined to be over 120 fs. Some circuitand layout techniques will be presented in FIG. 3 to FIG. 5 to addressways of measuring small time differences. Furthermore, the continualscaling of CMOS and III-V semiconductors and improvements of circuittechniques will constantly improve the ability to push the performanceenvelope. In addition, techniques to compensate noise considerationsneed to addressed, for instance, averaging, error correction methods,etc.

FIG. 1C illustrates the source and detector 1-8 at the edge of theeyeglass 1-7 where this source and reflected propagate along thetransparent material 1-19 are reflected off the prism interface 1-17.These refracted waves 1-12 are emitted towards the blind point and thewaves 1-13 are reflected from the blind point as the wave propagates inthe cornea 1-5, the crystalline lens 1-2, and the vitreous humor.Meanwhile, the focusing information can be applied to a projectionsystem using a Light Emitting Diode (LED) system by reflecting an imagefrom the near surface of the eyeglass 1-7 and providing the proper focusfor the image from the eyeglass onto the retina of the eye 1-1. An LEDsystem could also be substituted for the LED system and the addition ofa backlight and appropriate lensing in order for the propagation of animage to be reflected from the near surface of the eyeglass and focusingthe image into the retina of the eye 1-1.

Although only the right eye has been shown, the left eye typically has asymmetrical behavior as the right eye 1-1 such that similar stimulus andmeasurements can be performed on the left eye as well. In some cases,only one measurement is required if the left and right are well matchedsince this one measurement can be shared between the two eyes. If theleft and right eyes are not matched in the individual, the stimulus andmeasurements for both eyes are required, such that, each eye is measuredindividually.

FIG. 1D illustrates the right eye 1-1 viewing an LFP image beingdisplayed on a display screen 1-20 along the optic axis 1-30 of the eye.Meanwhile, the source and detector 1-8 propagates the source andreceives the reflected wave through a portion of a transparent material1-19 where the end of the material is angled with the prism interface1-17. The source propagates in the cornea 1-5 and the crystalline lens1-2 onto the blind point and is reflected back to the source anddetector 1-8. The user views the LFP image being displayed on a displayscreen 1-20 and attempts to focus on a different POD. The display screencan be on a smart phone, a tablet, notebook, etc. and can be wirelesscoupled to the accommodation system. As the eye attempts to focus onthis new POD, the crystalline lens changes in thickness. The thicknessvariation is measured by the accommodation system. The measuredaccommodation of the eye 1-1 is applied as an input to the embeddedalgorithm that causes the LFP image being displayed on a display screen1-20 to present the image corresponding to the different POD.

FIG. 1E illustrates the electromagnetic radiation from the source anddetector 1-8 entering the eye along the optical axis 1-30. In this case,the incident electromagnetic radiation 1-12 is reflected from the retinaat the backside of the eye and reflected back as the electromagneticradiation 1-13 through the vitreous humor, the crystalline lens 1-2, thecornea 1-5 and the free space between the cornea and the prism 1-23. Inaddition, a laser system 1-24 is projecting an image that is writtendirectly onto the retina of the eye. This type of system is known as thevirtual retina display (VRD). There are additional ways of introducingimages into the eye by bouncing reflected light from the curved surfaceof the lens directly into the eye, different forms of projection ontothe front surface of the eyeglass, a fiber-optic system with focusinglenses arranged to focus the image directly onto the retina of the eye,and other techniques which are currently well-known in the art. FIG. 1Ealso illustrates that the sense and probing of the thickness of thecrystalline lens 1-2 can also be done along the optical axis of the eye.It is important that the material 1-23 is as transparent as possible.The image can also be introduced into the transparent material 1-23 byinserting the electromagnetic radiation corresponding to the image usingan LCD or LED system. The information bearing the image would bepresented by a driver (not shown) which is parallel to the source anddetector 1-8. The reflected electromagnetic radiation corresponding tothe image from the prism 1-23 will be focused onto the retina of the eye1-1.

FIG. 1F illustrates the source and detector 1-8 at the end of a pair offiber-optic wires 1-27 and 1-26. These fiber-optic wires are fused withthe transparent material 1-19. A prism interface 1-28 reflects the waveand focuses it by the lens 1-25 coupled to the surface of thetransparent material 1-19. The prism reflected wave impinges directlyonto the blind point of the eye after propagation through free space,the cornea 1-5, the crystalline lens 1-2, and it the vitreous humor.Meanwhile, the right eye 1-1 viewing an LFP image being displayed on adisplay screen 1-20 along the optic axis 1-30 of the eye. The displayscreen can be on a smart phone, a tablet, notebook, etc. and can bewireless coupled to the accommodation system.

A current mechanical lenses system can comprise any moving structureexternal to the eye which adjusts a current focus of the lenses system.As an individual gets older, the focusing ability of the natural eye isdiminished. An external lenses system such as eyeglasses can be used tocompensate for the lack of natural accommodation that the crystallinelens once had. Currently, the mechanical adjust is performed by a user'sphysical action to twist, turn, move a knob or sensing unit. Forexample, by adjusting a lever, moving the head to activate anaccelerometer within the eyeglasses to control focus, etc.

A mechanical lenses system for eyeglasses can be controlled directly bythe use of the accommodation system instead of the user intentionallymoving a physical structure. FIG. 2A illustrates the measurement of theaccommodation using the source and detector 1-8 transmitting andreceiving electromagnetic radiation, the transparent material 1-19embedded in the eyeglass 1-7, the prism 1-17 reflecting the transmittedand received electromagnetic radiation to the eye 1-1 from/to the sourceand detector 1-8, and the source path 1-12, the blind point and thereflected path 1-13 through the right eye 1-1 which includes thecrystalline lens 1-2 in the cornea 1-5. The optical axis 1-30perpendicular to the first eyeglass 1-7 and the second eyeglass 2-4displaced by a gap 2-3 from the first eyeglass. The gap 2-3 can beincreased or decreased using the motor assembly 2-10 which comprises amotor 2-1 and some gears 2-2 that can vary the gap 2-3 between these twoeyeglass elements. Although, these eyeglasses have been indicated asrectangular in nature, the eyeglasses can be convex, concave, or both.These eyeglasses present an eyeglass image to the user. As the distance2-3 between the two eyeglasses is varied, the focus plane of an eyeglassimage onto the retina of the right eye 1-1 is adjusted.

In FIG. 2A, when the user tries to focus their eye to a different POD ofthe eyeglass image, the right eye is being measured by the accommodationsystem providing a first T. As the user adjusts their focus to a desiredPOD from the initial POD, the accommodation system measures a second T.The difference between the first T and the second T provides a timedifference in propagation delay (δT) corresponding to the accommodationof the right eye. An accommodation table uses this δT to determine thedesired POD. Thus, as the user focuses on the desired POD of theeyeglass image, the accommodation system provides the inputs to theμController. The μController issues commands and electrical signals tothe motor assembly 2-10. This stimulus adjusts the motor such that thephysical eyeglasses are brought into focus for the desired POD that theindividual desired. Thus, the user does not intentionally vary aphysical part to adjust the eyeglasses; instead, the crystalline lens1-2 of the eye is involuntarily focused by the user attempting to adjusttheir focus to the desired POD

There are many forms of mechanical adjustments that are being used toaddress the self-focusing of eyeglasses through mechanical means.Another example, in FIG. 2B, the accommodation system comprising thesource and detector 1-8, the transparent material 1-19 the incoming rays1-13, and outgoing rays 1-12, through the cornea 1-5, the crystallinelens 1-2 and reflected off of the blind point of the right eye 1-1 backto the source and detector 1-8 is used to measure the δT in thecrystalline lens 1-2 between a current POD and a desired POD. Anaccommodation table uses this δT to determine the desired POD. The δTtranslates into a thickness difference in the crystalline lens 1-2. Thisvariation in the thickness occurs because the individual is trying tofocus to a desired POD. As the user focuses on the desired POD, theaccommodation system provides the inputs obtained from the accommodationtable to the μController. The μController issues commands and electricalsignals to the liquid pump 2-8. The pump 2-8 uses the fluid reservoir2-9 to adjust the clear fluid flow to the input port 2-7 of theadjustable curvature lens 2-6 in order to adjust the radius of curvatureof lens 2-6 by adjusting the thickness 2-5. This thickness change can beviewed as a mechanical change to the lens 2-6. Once the desired POD isobtained, the accommodation system senses that the variation in thethickness decreases and the user is viewing the desired POD in focus. Inaddition, as the user refocuses his eye to a new POD, the accommodationsystem measures the thickness variation and adjusts the pump 2-8 (toextract or add fluid) from/to the lens 2-6. The lens 1-7 may not benecessary. This application of measuring the crystalline lens thicknessprovides a way of adjusting mechanical eyeglasses by focusing thetypically involuntary ciliary muscle control of the crystalline lens1-2.

FIG. 3A illustrates a top view of the source and detector integratedcircuit 3-1. The integrated circuit 3-1 as a dimension of width 3-7 andheight 3-8. The integrated circuit 3-1 comprises a semiconductorsubstrate 3-3 with high-speed Schottky diodes 3-2 a through 3-2 d. Theseform a part of the detector and can distinguish sub-picosecondvariations in delay. The response of the incident wave front 1-13 a and1-13 b is measured by a circuit incorporating these Schottky diodes. Inthe center is another semiconductor substrate 3-5 with a laser 3-4 thatemits the source of the electromagnetic radiation 1-12. These could befemto-sec pulsed lasers. The entire integrated circuit may havedimensions on the order of about one or two millimeters on a side.

A side view of a structure similar to FIG. 3A is illustrated in FIG. 3B.The integrated circuit 3-1 comprises a III-V substrate 3-12 with asecond laser substrate 3-5 solder bumped 3-9 to the II-V substrate. Inaddition, on the substrate 3-5 is the laser 3-4 which emits theelectromagnetic radiation 1-12. The Schottky diodes can be improved inperformance to detecting the incident wave front 1-13 a and 1-13 b ifthey are grown in III-V as illustrated in FIG. 3C. In this case, thelaser substrate 3-5 is solder bumped 3-9 to the III-V substrate 3-10.The III-V chip 3-10 is solder bumped 3-11 to the CMOS substrate 3-13forming the integrated circuit 3-1. The incident rays 1-13 a and 1-13 bfall on the Schottky diodes fabricated in the III-V substrate 3-10. Thelaser emits the electromagnetic radiation 1-12 from the laser substrate3-5. The CMOS substrate 3-13 contains additional circuitry such as A/Dconverters, clocking circuitry, timing circuitry, and an interface to amicroprocessor, and circuitry that is well known in the art to properlyoperate CMOS circuitry. These CMOS circuits are used to measure the δTin the crystalline lens 1-2.

FIG. 4 illustrates the high-speed circuitry formed from the Schottkydiodes. The Schottky diodes are used in a photodiode circuit 4-1 a andin the duplicate photodiode circuit 4-lb. Schottky diodes are also usedin the detectors 4-4 a and 4-4 b. The photodiode circuit comprises acapacitor C₁ and resistor R₁ coupled to a DC voltage. The Schottky diode4-2 is sensitive to electromagnetic radiation 1-13 a and couples R1 toR2. The duplicate hotodiode in the photodiode 4-1 b intercepts theelectromagnetic radiation 1-13 b. The outputs of the photodiodes areapplied to a detectors 4-4 a and 4-4 b. The 4-4 a detector comprises theresistance R₂ placed across the output of the photodiode and a Schottkydiode 4-3 in series with a capacitor C₂. The output is extracted acrossthe capacitor C2 and is applied to a high-speed A/D converter 4-5 a. Thenumber of photodiode and detector circuits can be greater than or lessthan two, although only two are illustrated. The output of the duplicatedetector circuit 4-4 b is applied to the high-speed A/D 4-5 b. The A/Dconverter 4-5 a is clocked by the signal 4-16 a while the A/D converter4-5 b is clocked by the signal 4-16 b. The digital outputs of the A/Dconverters are applied to the processor 4-6 interacting with in memory4-7. The processor is used to calculate δT 4-8 which determines thedesired POD 4-9. An accommodation table provides data concerning thedesired POD and is applied to a μController 4-13. The μController'soutputs are applied to the block 4-14 containing the mechanical adjustsystem for the glasses 4-15.

Besides mechanical glass control, the output of the Desired POD 4-9 canbe applied to the block 4-10. An embedded algorithm uses the retrievedLFP image and the desired POD to adjust the retrieved LFP image 4-11with a current POD to an image with the desired POD. The newly desiredPOD generates the image with the corresponding POD and is applied orprojected onto the glass lenses or a display 4-12.

FIG. 5A illustrates one particular layout that may exist on the surfaceof the CMOS substrate along with some timing parameters associated withdriving this particular layout 5-1. The layout comprises a microstripline designed to carry a short pulse over a distance of severalcentimeters. The overall description 5-1 illustrates the CMOS substrate3-13 and the corresponding timing parameters 5-9 through 5-11. Themicrostrip line on the CMOS substrate 3-13 couples to a driver 5-3 whichlaunches the signal at node A of the microstrip line and propagates thatsignal on the microstrip line in the direction of 5-5. When the signalarrives at node B of the microstrip line, the signal is tapped atseveral points separated by the distance 5-7 until the signal terminatesat node C of the microstrip line. These tap points are equivalent to thenodes 4-16 a and 4-16 b. A termination impedance (not shown) is used toterminate the microstrip line. The propagation time for the wavefrontalong the microstrip line from node A to node C should equal to thepropagation time for the electromagnetic radiation to make the roundtrip path from the source and detector 1-8 to the eye then reflectedback along the reverse path back to the source and detector 1-8 which isa distance of about 4.8 mm plus 2 ΔD 5-9. ΔD is shown earlier and is thedistance in free space between the laser and the surface of the eye.Node C has proper termination to prevent the waveform from beingreflected of the end of the microstrip line. The tap points between nodeB and node C are sent to the A/D 5-8. The tap points along themicrostrip line have a separation 5-7 which are used to generate shortdivisions of time 5-10 which are applied to a sequence of A/D's in thecircuit block 5-8 (nodes 4-16 a and 4-16 b). When the driver 5-3 sendsthe wavefront signal on the microstrip line 5-6, a pulse issimultaneously sent to enable the laser 5-4 so that the laser will admitelectromagnetic radiation which will propagate toward the eye andreflect off the blind point where a portion will make its way back tothe source and detector 1-8 located on the CMOS substrate 3-13. Althoughthe source and detector 1-8 is not illustrated in FIG. 5A, the circuitryfor the photo detectors were described earlier. The goal of this thecircular layout for the microstrip line is to pack as much microstrip onthe surface of the CMOS substrate to achieve the desired propagationtime. Various layout strategies can be used for the layout. As mentionedearlier, the T of the laser light to propagate through free spacethrough the eye and reflected back through the eye through free space tothe photodetector has the same time duration as the propagation of thewaveform along the microstrip line 5-6 from node A to node C. Thus,these two systems will be timed equally to ensure that the timing forcapturing the return electromagnetic radiation by the photodiodes occursat the right time. The division of the microstrip line 5-7 shown betweennode B and node C should have a delay increment of approximately 0.02 ps5-10. The δT from viewing a POD at infinity to a POD at minimum is equalto the laser light to propagate along a 2 micrometer distance in anindex of refraction of 1.4 5-10. The accommodation is a relatively rapidprocess and occurs within the eye in about 350 ms 5-11 which sets therepetitive rate of the pulses. Thus, the power dissipation of the timingcircuit can be reduced since the wavefronts can be created with aseparation greater than 350 ms 5-11. In box 5-11, the wavefront pulsesare illustrated as 5-13 which further reduces the over power dissipationsince the driver has a very short duty cycle. To perform noiserejection, the pulse may be quickly repeated in short bursts to achievenumerous measurements and utilize well known noise reduction techniquesto improve the measurement of the delay.

FIG. 5B and FIG. 5C illustrates LFP plenoptic images which containseveral PODs and the focus depth where currently only one of the PODsare in focus. A plenoptic LFP image contains all the informationnecessary to bring any one of the PODs into focus. In FIG. 5B, 5-13illustrates a particular image that contains several PODs ranging from5-14 through 5-20. Only POD 5-16 is in focus, the remaining PODs 5-14,5-15, 5-17 through 5-20 are out of focus. To bring the other PODs intofocus requires an embedded algorithm that manipulates the overall LFPimage of the plenoptic camera system such that a different POD isbrought into focus. This is illustrated in FIG. 5C, a plenoptic LFPimage 5-21 with the POD 5-23 being in focus while the remaining PODs5-14, 5-15, 5-22, and 5-18 through 5-20 are out of focus. These PODswere generated by the plenoptic system which provides specialcharacteristic that the image taken by the plenoptic system containsinformation about all the PODs that exists on the LFP image. The natureof this LFP image is one where the embedded algorithm associated withthe plenoptic system image allows the LFP image to be manipulated usingthis embedded algorithm such that a different POD is brought into focus.

FIG. 6A illustrates a process which collects the results of theaccommodation test system applied to the test LFP image 6-5 being viewedby the user 6-21. The test LFP image is generated by a plenoptic camerapresented to the user has PODs at known distances (∞, 100 m, 64 m, 32 m,16 m, 8 m, 4 m, 2 m, 1 m, 0.75 m, 0.5 m, 0.25 m, etc.), for example. Asthe individual or user 6-21 is presented an LFP image at a known POD,the accommodation test system monitors the thickness of the user'scrystalline lens 1-2 to measure the thickness variation from a previousmeasurement and apply that thickness variation, δT, to generate aaccommodation table 6-20. The POD is decreased incrementally 6-13 andapplied to the embedded algorithm associated with the plenoptic camerato alter the LFP image to be so such that a different POD is broughtinto focus. The data is collected and used to generate the accommodationtable 6-20.

The test LFP image has PODs at known depths (∞, 100 m, 64 m, 32 m, 16 m,8 m, 4 m, 2 m, 1 m, 0.75 m, 0.5 m, 0.25 m, etc.), for example, and iscaptured by the image sensor array in the plenoptic camera 6-1 formed bya plurality of microlenses can be stored in memory, a computer embeddedalgorithm can be developed to manipulate the light information retrievedfrom memory to generate how the image would appear when viewed from adifferent POD. The image is stored 6-2 into a local memory. This testLFP image stored 6-2 contains all the information such that the imageand the embedded algorithm can refocus the existing LFP image to any oneof the POD's. The stored image is recalled from memory and is providedto generate the POI) at co using the embedded algorithm 6-3 associatedwith the plenoptic camera 6-1. This image focused at a known POD (∞) ispresented 6-4 to the user 6-21 along the optical path 6-5 and enters theuser's eye. Meanwhile, the accommodation test system is monitoring thecrystalline lens 1-2 of the user 6-21 by using the source and detector1-8 which probes the user's crystalline lens by the incident andreflected electromagnetic radiation 6-7. The probing providesinformation concerning the thickness and the variation in thickness ofthe crystalline lens. Since the POD is set at infinity, the crystallinelens has the minimum thickness. The user views the test LFP image 6-4. Await period 6-19 occurs to insure that the user accommodates to the testLFP image. This wait period could be as long as 350 ms. A strobe isissued 6-6 to align the timing required to capture the reflectedwaveform within the photodetectors of the source and detector 1-8. Asmentioned earlier, this strobe can be a burst comprising a number ofindividual closely spaced pulses of laser energy to obtain numerousmeasurements for noise reduction purposes. The result of the measurementis applied to block 6-8 to determine if the POD is set at infinity 6-8.If the answer is yes, then measure the delay T, and setting δT to zero6-9. If the answer is no, then the POD is not set to infinity andperform the measurement T 6-10 and calculate δT 6-11 based on theprevious time measurement. Each measurement of T, calculation of δT, andknown POD is stored 6-12 in a memory array 6-14. The process at thispoint proceeds two ways: 1) the results T, δT, and POD are retrievedfrom the memory array 6-18 and these are used to generate anaccommodation table 6-20 which will be described in FIG. 6B; and 2)decrease POD incrementally 6-13 and determine if the minimum POD hasbeen approached 6-15. If not, use the embedded algorithm to generate atest LFP image corresponding to POD 6-16 and then present the test LFPimage with known POD to the user 6-4. This process continues until theminimum plane of that 6-15 occurs at which point the process is done6-17 and the complete accommodation table is generated 6-20.

The system in FIG. 6B anticipates the users 6-21 attempt to focus at adifferent POD. The user attempts to refocus the current in-focusplenoptic LFP image to a different POD. This event occurs because theuser sees the out of focus POD and attempts to focus on it. Thecrystalline lens changes in thickness and since the user 6-21 ismonitored by the accommodation system, the variation of the crystallinelens 1-2 of the user 6-21 illustrates that a newly desired POD is beingselected by the user. Once the newly desired POD is achieved, the usercan view the image at the newly desired POD or decide to focus on adifferent POD within the image and allow the accommodation system inconjunction with the plenoptic LFP image and the embedded algorithm toonce again refocus the current original image to this newly differentPOD.

A plenoptic LFP image is recalled from memory 6-22 and the POD is set to∞ using the embedded algorithm 6-23 after which the LFP image atinfinity is generated 6-24. The LFP image can be shared with others 6-25whereby the LFP image and parameter data concerning the LFP image issent to guest 6-26. Otherwise, the user views the focused image 6-27along the visual path 6-5. Although not illustrated, when the LFP imageis presented to the user, a superimposed text can indicate that the usershould focus on the image as is. While the user is viewing the image, asource and detect unit 1-8 emits and receives the reflected radiation6-7 from the user's eye. After the user views the focused image 6-27, await period occurs 6-19 and then a strobe (or strobe burst, this willnot be mentioned again) is issued 6-6 to the source and detector 1-8 toemit and receive the reflected radiation 6-7 and measure T 6-10. Theprevious T, if it exists, is recalled from memory 6-28. If the user 6-21had viewed the focused image 6-29, then store T 6-30 and the user shouldattempt to focus on a different POD in the image 6-31. The user shouldattempt to view the image at the unfocused different POD 6-32. Althoughnot illustrated, when the LFP image is presented to the user, asuperimposed text can indicate that the user should attempt to view theunfocused different POD. A 350 ms wait period occurs 6-19 and then astrobe issued 6-6 to the source and detector 1-8 to emit and receive thereflected radiation 6-7 and measure T 6-10. The previous T is recalledfrom memory 6-28. If the user 6-21 had not viewed the focused image6-29, calculate δT (by taking the difference between T and the previousT) and interpolate the POD_(T) from the accommodation table 6-33. Thenuse this information of POD_(T) and δT in the embedded algorithm toadjust the LFP image at the unfocused different POD_(T) 6-34. The LFPimage can be shared with others 6-25 whereby the LFP image and parameterdata concerning the LFP image is sent to guest 6-26. Otherwise, the userviews the focused image 6-27 along the visual path 6-5.

FIG. 6C is a simplified version of the flowchart given in FIG. 6B.First, view an LFP image generated by a plenoptic camera 6-35. The userfocuses on a different POD in the LFP 6-36 image. The accommodationsystem is used to calculate δT 6-11 from the measured current T andprevious T. The results are checked against the accommodation table6-37. At this point, the embedded algorithm which alters the POD of theLFP image 6-38 is utilized to refocus the original LFP image to thesecond POD that the user attempted to view when the second POD was outof focus. Once the second POD is brought into focus, the newly focusedsecond POD LFP image is by the user 6-39. If the user wants to continuethe process 6-40 then the user will focus on another different POD ofthe LFP image 6-36 and repeat the process steps. Once the user issatisfied then the user can terminate or stop 6-41 the process.

FIG. 6D illustrates a flowchart which automatically adjusts the POD ofan a single lens or both lenses of an eyeglass. An object in a FOV(eyeglass image) is viewed at a given POD using automatically adjustableeyeglasses 6-42. The user focuses on a different POD in the eyeglassimage 6-43. The accommodation system is used to calculate δT 6-11 fromthe measured current T and previous T. Use the calculated value andcheck the accommodation tables 6-37 to extract out the given POD andmechanically or fluidly alter the POD of the eyeglasses 6-44 so that theeyeglasses focus on this different POD. This allows the user toautomatically view this different POD focused in the FOV 6-45. If theuser wants to look at a second different POD then move to block 6-43 andrepeat the process, otherwise when done 6-40 stop 6-41 the process.

FIG. 7A illustrates the back of a smart phone 7-3 such as a cell phone.The back contains a plenoptic camera lens 7-1 and camera assembly;however, the front can contain the plenoptic camera lens 7-1, at theexpense of increased smart phone size since the display screen isalready occupying the front. The plenoptic camera is a 4×4 array ofindividual cameras with microlenses which takes the image simultaneouslyand combines the images together into one LFP image. In addition, abovethe plenoptic camera is an output view port 7-2 which offers a FOV tothe user from the other side of the cell phone. For example, see FIG.17B and the FOV 17-5 corresponding to the output view port of theportable unit 7-3 a. FIG. 7B presents the front surface of the smartphone 7-3. The screen display 7-4 can display the plenoptic imagecaptured by the plenoptic camera lens 7-1. The input view port 7-2 i canbe used by the user to view an LFP image created by the plenoptic camerathat may be superimposed over an image of the FOV at the output eye port7-2 or display an image completely due to the output from the plenopticcamera.

FIG. 7C illustrates the back of a smart phone 7-3 a such as a cellphone. The back contains two plenoptic cameras 7-1 and 7-6. Both are a4×4 array, although other array sizes are possible, of individualcameras with microlenses which takes the image simultaneously andcombines the images of each plenoptic camera together into an LFP image.In addition, above each plenoptic camera is an output view port 7-2 and7-5 which offers a stereoscopic FOV to the user. For example, see FIG.17B and the FOV 17-4 and 17-5 corresponding to the output view ports ofthe portable unit 7-3 a. FIG. 7D presents the front surface of the smartphone 7-3 a. The screen display 7-4 can display the plenoptic imagecaptured by both plenoptic camera lenses 7-1 and 7-6. The input viewport 7-2 i and input view port 7-5 i can be used by the user to view astereoscopic image created by the plenoptic cameras which may besuperimposed over an image of the FOV collected at the output eye ports7-2 and 7-5 or display an LFP image completely due to the output fromboth plenoptic cameras. The baseline distance separation of theplenoptic cameras help to improve the Long Range (LR) stereoscopic 3-Dimage that can be focused to different PODs. The LR stereoscopic 3-Dimage improves as the baseline distance increases.

FIG. 8A illustrates an block diagram of an apparatus with a plenopticcamera that can be coupled to guest's remote eyeglasses or smart phones.The portable unit 7-3 comprises a processor 8-3 coupled to a display 7-4and an accommodation system 8-7. FIG. 20A comprises a more detailed listof items in the portable unit. The processor 8-3 is also coupled to amemory 8-4 and the plenoptic camera 7-1. The accommodation system 8-7contains the apparatus to set the accommodation 8-6 which includes theeye port 7-2 providing a SR stereoscopic 3-D image (since there is onlyone plenoptic camera) that can be focused to different PODs. Inside theeye port is the source and detector 1-8 that is used to determine the δT8-5. The results of the δT are applied to the processor which then setsthe accommodation 8-6 of the LFP image. Not illustrated within 7-3 isthe wireless communication link coupling the wireless device 7-3 to aremote device 8-1. The remote device 8-1 can be the Internet, theintranet, the cloud, or any servers that can transfer data to/from thewireless device 7-3. In addition a wireless communication link is can beestablished to guest's remote glasses or smart phones 8-2. Thecommunication link can be cellular, Wi-Fi, Bluetooth, or any other knownwireless standard that can transfer data between two locations.

FIG. 8B illustrates the smart phone 7-3 a comprising two plenopticcameras 7-1 and 7-6 and two eye ports 7-2 and 7-5. The portable unit 7-3a comprises a processor 83 coupled to a display 7-4 and a setaccommodation system 8-7 a. FIG. 20A comprises a more detailed list ofitems in the portable unit. The processor 8-3 is also coupled to amemory 8-4 and the plenoptic cameras 7-1 and 7-6. The set accommodationsystem 8-7 a contains the apparatus to set the accommodation 8-6 whichincludes two eye ports 7-2 and 7-5 providing a LR stereoscopic 3-D image(since the two plenoptic cameras can be separated by a large baseline)that can be focused to different PODs. Inside at least one eye port isthe source and detector 1-8 that is used to determine the δT 8-5. Theresults of the δT are applied to the processor 8-3 which then sets theaccommodation 8-6. Not illustrated within 7-3 a is the wirelesscommunication link couple coupling the wireless device 7-3 a to a remotedevice 8-1. The remote device 8-1 can be the Internet, the intranet, thecloud, or any servers that can transfer data to/from the wireless device7-3 a. In addition a wireless communication link can be established toguest's remote glasses or smart phones 8-2. The communication link canbe cellular, Wi-Fi, Bluetooth, or any other known wireless standard thatcan transfer data between two locations.

FIG. 9A presents a flowchart that allows a user to share their images atvarious PODs with guests. As the user focuses to a different POD, thecorresponding LFP image is presented to the guest so that both the userand the guest can view the identical LFP image at a particular POD. Thisis called sharing an LFP image set to a particular POD by the user. Notethat the plenoptic image has a short range (SR) 3-D adjustment when oneplenoptic camera is utilized and has a long-range (LR) 3-D stereoscopicadjustment when two plenoptic cameras are utilized. As the user changesthe POD, the wireless communication link of the wireless device and theguest's wireless device couples and transfers the newer representationof the POD to the guest.

The process in FIG. 9A begins by viewing both SR 3-D LFP imagesgenerated by the plenoptic camera 9-1 where this image can be extractedfrom memory that can be local, on another smart phone, on the Internet,Intranet, cloud or any servers storing images. The image can also begenerated by the user's or guest's plenoptic camera. The user can focuson a different POD of the LFP image 9-2. The accommodation system can beused to measure δT 6-11 and the extracted data can be checked against analready existing data in an accommodation table 6-37 that can be storedin an array memory. The processor can then utilize the embeddedalgorithm to alter the SR 3-D POD of the LFP image 9-3. At this point,the user automatically views the different SR 3-D POD of the LFP image9-4. The information associated with the different SR 3-D POD image canbe shared 6-27 with a guest. The guest receives the data and the SR 3-DPOD image and checks the guest's accommodation table 9-5. Then, theguest's microprocessor compares and if necessary scales theaccommodation table of the guest's image to the user's image 9-6. Theguest's microprocessor utilizes the embedded algorithm to alter the SR3-D POD of the LFP image for the guest 9-7. Then, the guest canautomatically view the different SR 3-D POD of the LIP image which theuser currently sees 9-8. If complete or Done 6-38 then stop 6-39;otherwise, return control to the user so the user can focus on adifferent SR 3-D POD of the LFP image 9-2. Although, FIG. 9A illustratesthe user being the master and the guest being the slave, it is alsopossible for both the user and the guest to be masters such that theimage being viewed by both user and guest can be modified by either theuser or the guest and shared amongst the two. Each different LFP imageare viewed, one by the right eye, the other by the left eye. These LFPimages are visually blended together by the viewer's mind to appear asone LFP image to the user showing the SR 3-D POD of the LFP image.

The process in FIG. 9B begins by viewing both LR 3-D LFP imagesgenerated by two plenoptic cameras 9-9 where this image can be extractedfrom memory that can be local, on another smart phone, on the Internet,Intranet, cloud or any servers storing images. The image can also begenerated by the user's or guest's plenoptic cameras. The user can focuson a different POD of the LFP image 9-2. The accommodation system can beused to measure δT 6-11 and the extracted data can be checked against analready existing data in an accommodation table 6-37 that can be storedin an array memory. The processor can then utilize the embeddedalgorithm to alter the LR 3-D POD of both LFP images 9-10. At thispoint, the user automatically views the different LR 3-D POD of the LFPimage 9-11. The information associated with the different LR 3-D PODimage can be shared 6-27 with a guest. The guest receives the data andthe LR 3-D POD image and checks the guest's accommodation table 9-5. Theguest's microprocessor compares and if necessary scales theaccommodation table of the guest's image to the user's image 9-6. Then,the guest's microprocessor utilizes the embedded algorithm to alter theLR 3-D POD of both LFP images for the guest 9-12. The guest canautomatically view the different LR 3-D POD of both LFP images 9-13which the user is currently viewing 9-11. If complete or Done 6-38 thenstop 6-39 otherwise, return control to the user so the user can focus ona different LR 3-D POD of the LFP image 9-2. Although, FIG. 9Aillustrates the user being the master and the guest being the slave, itis also possible for both the user and the guest to be masters such thatthe image being viewed by both user and guest can be modified by eitherthe user or the guest and shared amongst the two. Each different LFPimage are viewed, one by the right eye, the other by the left eye. TheseLFP images are visually blended together by the viewer's mind to appearas one LFP image to the user showing the LR 3-D) POD of the LFP image.

FIG. 10A illustrates glasses 10-1 comprising plenoptic camera 7-1,memory, an accommodation system, and an accommodation test system. Theglasses also comprises at least one wireless communication interface10-10, a primitive keyboard (not illustrated), lenses 1-7 and 10-2, atop frame 10-9 and a lower frame 10-3, if necessary, to hold the lenses,a nose support 10-4, support arms 10-5 and 10-6 that can be setperpendicular to the plane of the frame which holds the eyeglasses inposition on the user's head by placing the arms over the top of the ear,a transparent bar 1-19, and an assembly formed within the arm 10-5. Theassembly comprises the electronics to operate the glasses, the camera,the remaining portion of the accommodation system, a speaker andearphone (not illustrated), a module for voice recognition, and voicegeneration (for example, see FIG. 20B and FIG. 21). The glasses can forma wireless communication link with a remote device 8-1 to store orretrieve data from the Internet. The wireless communication link 10-10is used to communicate locally with other glasses or smartphones. Thetransparent bar 1-19 feeds data to the accommodation system oraccommodation test system. Images or videos can be projected onto thelenses 1-7, 10-2, or both, such that, these images are sent to andfocused onto the retina of the eye.

LFP images are shared using devices coupled by a wireless communicationnetwork. The devices can take various forms. When the user and the guestshare LFP images, the apparatus that the user and the guest use can bevaried. For example, the user can use a projection system housed oneyeglasses while the guest can use a projection system housed oneyeglasses, the eye ports of a attachable wireless unit, the eye portsof the smart phone, or the display screen of a smart phone to share andtransfer images. Similarly, the guest can use a projection system housedon eyeglasses while the user can use a projection system housed oneyeglasses, the eye ports of a attachable wireless unit, or the eyeports of the smart phone to share and transfer images. Thesecombinations are not exhaustive and other combinations can easily beconceived.

FIG. 10B illustrates glasses 10-8 comprising two plenoptic cameras 7-1and 7-6, an accommodation system, and an accommodation test system. Theglasses also comprises at least one wireless communication interface10-10, a primitive keyboard (not illustrated), lenses, a top frame and alower frame to hold the lenses, a nose support, support arms that can beset perpendicular to the plane of the frame of the frame which holds theeyeglasses in position on the user's head by placing the arms over thetop of the ear, at least one transparent bar 1-19, and at least oneassembly formed within one of the arms. The assembly comprises theelectronics to operate the glasses, the camera, the remaining portion ofthe accommodation system, accommodation test system, a speaker andearphone (not illustrated), a module for voice recognition, and voicegeneration. The glasses can form a wireless communication link with aremote device 8-1 to store or retrieve data from the Internet. Thewireless communication link 10-10 is used to communicate locally withother glasses or smartphones. The transparent bar 1-19 feeds data to theaccommodation system or accommodation test system. Images or videos canbe projected onto one lens, or both, such that, these images are sent toand focused onto the retina of the eye. A third wireless communicationlink 10-11 allows communication between the left and right arms. Thethird wireless communication link 10-11 can be replaced with a wiredconnection connecting the left and right arms.

FIG. 11A illustrates a guest using the combination of eyeglasses 11-1and smart phone 7-3 with a display screen 7-4 to view what the user issending the guest. The eyeglasses do not have lens but provide a frame11-2 to hold the transparent material 1-19 to probe the guest's eyes anda wireless interface 10-10 that couples the eyeglasses of the guest tothe apparatus associated with the user. The display screen 7-4 of thesmart phone 7-3 is coupled to the guests eyeglasses by wirelessinterconnect 11-10. The guest's right eye 11-4 views 11-6 the image onthe display screen of the wireless unit while the guest's left eye 11-5views 11-7 the image on the display screen 7-4 of the wireless unit 7-3.The glasses contained a frame 11-2 with a nose rest 11-3 and arms 10-5and 10-6 when open are perpendicular to plane comprising 11-2. Anassembly in the arm 10-5 comprises the electronics to operate theglasses, the camera, the remaining portion of the accommodation system,accommodation test system, a speaker and earphone (not illustrated), amodule for voice recognition, and voice generation. On the frame 11-2 isa plenoptic camera 7-1 and a transparent bar 1-19. The transparent barcan contain a prism to reflect an incident electromagnetic wave into theright eye 11-4 and then reflect a reflected electromagnetic wave fromthe eye to a source and detector 1-8 to measure the crystalline lenscharacteristics of the guest's eye 11-4. The remote device 8-1 can bethe Internet, the intranet, the cloud, or any servers that can transferdata to/from the eyeglasses 11-1.

FIG. 11B illustrates a guest 11-11 using a display screen 7-4 to viewwhat the user is sending the guest. The wireless interface 10-10 thatcouples the smart phone 7-3 of the guest to the apparatus associatedwith the user. The display screen 7-4 of the smart phone 7-3 is viewedby the guest's eyes 11-8 and 11-9. The guest's right eye 11-8 views11-13 the image on the display screen of the wireless unit 7-3 while theguest's left eye 11-9 views 11-14 the image on the display screen 7-4 ofthe wireless unit 7-3. The remote device 8-1 can be the Internet, theintranet, the cloud, or any servers that can transfer data to/from thewireless unit 7-3.

FIG. 12A illustrates a user's eyeglasses 10-1 with a plenoptic camera7-1 that can be coupled to guest's remote display. The eyeglasses 10-1have an electronics system that comprises a processor 8-3, memory 8-4,and other components (see FIG. 20B and FIG. 21) coupled to anaccommodation system 8-7 b. The processor 8-3 is also coupled to amemory 8-4 and the plenoptic camera 7-1. The accommodation system 8-7 bcontains the apparatus to set the accommodation 8-6 which includes thelens 1-7 providing a SR stereoscopic 3-D image that can be focused todifferent PODs. A source and detector 1-8 associated with the lens isused to determine the δT 8-5. The results of the δT are applied to theprocessor which then sets the accommodation 8-6. Not illustrated within10-1 is the wireless communication link coupling the eyeglasses 10-1 toa remote device 8-1. The remote device 8-1 can be the Internet, theintranet, the cloud, or any servers that can transfer data to/from theeyeglasses 10-1. In addition, a wireless communication link is can beestablished to guest's remote display 11-2. The communication link canbe cellular, Wi-Fi, Bluetooth, or any other known wireless standard thatcan transfer data between two locations.

FIG. 12B illustrates a user's eyeglasses 10-8 comprising two plenopticcameras 7-1 and 7-6 and two lens 1-7 and 10-2. The eyeglasses 10-8comprises a processor 8-3 coupled to an accommodation system 8-7 c. Theprocessor 8-3 is also coupled to a memory 8-4 and the plenoptic cameras7-1 and 7-6. The accommodation system 8-7 c contains the apparatus toset the accommodation 8-6 which includes two lenses 1-7 and 10-2providing a LR stereoscopic 3-D image that can be focused to differentPODs. Associated with at least lens is the source and detector 1-8 thatis used to determine the δT 8-5. The results of the δT are applied tothe processor 8-3 which then sets the accommodation 8-6. Not illustratedwithin 10-8 is the wireless communication link couple coupling theeyeglasses 10-8 to a remote device 8-1. The remote device 8-1 can be theInternet, the intranet, the cloud, or any servers that can transfer datato/from the eyeglasses 10-8. In addition a wireless communication linkcan be established to guest's remote display 11-12. The communicationlink can be cellular, Wi-Fi, Bluetooth, wig be, or any other wirelessstandard that can transfer data between two locations.

FIG. 13A illustrates the back of a smart phone 7-3, for example, a smartphone coupled at an interface 13-3 to a attachable unit 13-4 thatcontains a plenoptic camera 7-1 and output eye port 7-2. The attachableunit can also be coupled to a smart phone orientated with the front sidesubstituted for the back side. The attachable unit 13-4 can also offer(although not shown) either the camera 7-1 or the eye port 7-2separately, or the camera 7-1 or the eye port 7-2 on the opposite side.The coupling at the interface 13-3 can be magnetic, electrical,mechanical, wirelessly, or any combination therein. This apparatusallows a smart phone to be coupled to a plenoptic camera. The front ofthe smart phone 7-3 is presented in FIG. 13B. The display screen 7-4typically exists on a smart phone 7-3 the interface 13-3 couples theattachable unit 13-4 to the smart phone and contains an input eye port7-2 i. The ability to couple attachable units to a smart phone addsflexibility to the system. The attachable unit coupled to the smartphone can also be used in other situations as shown shortly. Theseattachable units can contain cameras, eye ports, wireless access,electronics, power supplies, etc. The attachable unit which contains aplenoptic camera 7-1 allows the formation of a SR stereoscopic 3-D imagethat can be focused to different PODs by an accommodation system. Inaddition, each eye port can have a far/near button to manually adjustthe focus of the LFP image.

FIG. 13C illustrates the back of a smart phone 7-3, for example, a smartphone coupled at an interface 13-3 to a attachable unit 13-8 thatcontains two plenoptic cameras (7-1 and 7-6) and two output eye ports(7-2 and 7-5). The attachable unit can also be coupled to a smart phoneorientated with the front side substituted for the back side. Thebaseline distance separation of the plenoptic cameras help to improvethe LR stereoscopic 3-D image that can be focused to different PODs. TheLR stereoscopic 3-D image improves as the baseline distance increases.The coupling at the interface 13-3 can be magnetic, electrical,mechanical, wirelessly, or any combination therein. A communication link(wireless or wired through the interface 13-3) couples the smart phoneto the attachable unit 13-8. This apparatus allows a smart phone to becoupled to two plenoptic cameras. The front of the smart phone 7-3 ispresented in FIG. 13D. The display screen 7-4 typically exists on asmart phone 7-3 the interface 13-3 couples the attachable unit 13-4 tothe smart phone 7-3 and contains two input eye ports 7-2 i and 7-5 i.The ability to couple attachable units to a smart phone adds flexibilityto the system. The attachable unit attached to the smart phone can alsobe used in other situations as shown shortly. These attachable units cancontain two or more cameras, two or more eye ports, wireless access,electronics, power supplies, etc. The attachable unit which contains twoplenoptic cameras 7-1 and 7-5 allows the formation of a LR stereoscopic3-D image that can be focused to different PODs by an accommodationsystem. Each eye port can have a far/near button to manually adjust thefocus of the LFP image.

FIG. 14A illustrates an apparatus 14-1 with two elements: a smart phone7-3 and an attachable unit 13-4 with a first mating surface. The top ofa smart phone 7-3 has a second mating surface and can be coupled to anattachable unit 13-4 via the mating surfaces. The attachable unit 13-4contains a plenoptic camera 7-1 and output eye port 7-2. The physicalconnectivity between 13-4 and 14-3 can be magnetic or mechanical, whilethe electrical conductivity can be wireless or wired. A communicationlink (wireless or wired through the interface 13-3) couples the smartphone to the attachable unit 13-4. This apparatus allows a smart phoneto be coupled to an external plenoptic camera. The remote device 8-1 canbe the Internet, the intranet, the cloud, or any servers that cantransfer data to/from the smart phone 7-3. A far/near button (not shown)can be incorporated in the attachable units.

FIG. 14B illustrates the attachable unit 13-4 coupled to the eyeglasses14-3 using the mating surfaces. The attachable unit 13-4 contains anoutput eye port 7-2 and a plenoptic camera 7-1. The eyeglasses 14-3contained a frame 11-2, and nose rest 10-4, lenses 1-7 and 10-2, atransparent material 1-19, electronics 14-4 and two arms 10-5 and 10-6.The eyes of the user are shown as 11-4 and 10-5. The attachable device13-3 coupled to the eyeglasses 14-3 introduces the plenoptic camera tothe eyeglasses. The physical connectivity between 13-4 and 14-3 can bemagnetic or mechanical, while the electrical conductivity can bewireless or wired. The remote device 8-1 can be the Internet, theintranet, the cloud, or any servers that can transfer data to/from thesmart eyeglasses 14-3. A far/near button (not shown) can be incorporatedin the attachable units.

FIG. 15A illustrates an apparatus 15-1 with two elements: a smart phone7-3 and an attachable unit 13-8. The top, or for that matter any side,of a smart phone 7-3 can be coupled to an attachable unit 13-8. Theattachable unit 13-8 contains two plenoptic cameras is (7-1 and 7-6) andtwo output eye port (7-2 and 7-5). A coupling interface 14-2 can bemagnetic, electrical, mechanical, wirelessly, or any combinationtherein. This apparatus allows a smart phone to be coupled to aplurality of plenoptic cameras. Not illustrated within 13-8 is thewireless communication link couple coupling the attachable unit 13-8 toa remote device 8-1. The remote device 8-1 can be the Internet, theintranet, the cloud, or any servers that can transfer data to/from theattachable unit 13-8. The communication link can be cellular, Wi-Fi,Bluetooth, or any other known wireless standard that can transfer databetween two locations.

FIG. 15B illustrates the attachable unit 13-8 coupled to the eyeglasses15-4. The attachable unit 13-8 contains and two output eye port (7-2 and7-5) and two plenoptic cameras (7-1 and 7-6). The eyeglasses contained aframe, and nose rest 10-4, and two arms. The eyes of the user are shownas 11-4 and 10-5. The attachable device 13-8 coupled to the eyeglasses15-4 introduces the plenoptic camera to the eyeglasses. Furthermore, theeye ports are aligned with the pupils of the user's eyes 11-4 and 11-5.Thus, the attachable unit can be coupled to an eyeglass frame and allowthe user to view a LR stereoscopic 3-D image that can be focused todifferent PODs. The accommodation system in at least one of the eyeports is not shown. The physical connectivity between 13-8 and 15-4 canbe magnetic or mechanical, while the electrical conductivity can bewireless or wired. Not illustrated within 13-8 is the wirelesscommunication link coupling the attachable unit 13-8 to a remote device8-1. The remote device 8-1 can be the Internet, the intranet, the cloud,or any servers that can transfer data to/from the attachable unit 13-8.The communication link can be cellular, Wi-Fi, Bluetooth, wig be, or anyother wireless standard that can transfer data between two locations.The attachable unit which contains two plenoptic cameras 7-1 and 7-5allows the different PODs are focused by an accommodation system. Eacheye port can have a far/near button to manually adjust the focus of theLFP image.

FIG. 16 illustrates eyeglasses 16-1 the attachable unit 13-8 coupled tothe top frame 16-2 of the eyeglasses. The eyeglasses do not containlenses but instead view the display screen 7-4 of a smart phone 7-3. Thetransparent material 1-19 is coupled to the glasses 16-1. Thetransparent material can perform the accommodation test. The attachableunit 13-8 contains two plenoptic cameras 7-1 and 7-6 and two eye ports7-2 and 7-5. A wireless communication link 16-3 exists between theeyeglass 16-1 and all smart phones 7-3. The remote device 8-1 iswirelessly coupled to the Internet, the intranet, the cloud, or anyservers that can transfer data to/from the attachable unit 13-8. Thecommunication link can be cellular, Wi-Fi, Bluetooth, or any other knownwireless standard that can transfer data between two locations. Theremote device 8-1 is also coupled to the eyeglasses 16-1. The displayscreen 7-4 offers a SR stereoscopic 3-D image that can be focused todifferent PODs to the user.

FIG. 17A illustrates an apparatus 17-1 comprising a remote device 8-1which is wirelessly coupled to a smart phone 7-3 a. The smart phone 7-3a comprises a display screen 7-4 and two input eye ports 7-5 i and 7-2 iseparated by a first baseline. A user can place their left eye 11-5 overthe left input eye port 7-5 i and the right eye 11-4 over the rightinput eye port 7-2 i. Each input eye port can have a correspondingoutput eye port on the far side of the device aligned with the input eyeport, although this situation is not required. Instead, the user canview an LFP image or LFP videos captured by at least two plenopticcameras separated by a second baseline on the opposite side of theremote device. These LFP images can also be obtained after being storedin memory, either on the device or accessible via the remote device 8-1.Or, the user can view LFP images generated by others and accessible viathe remote device 8-1 or another wireless interface not shown. The opticaxis 17-2 of the right eye 17-3 allows the user to view a miniaturedisplay screen within the input eye port 7-21. The miniature displayscreen can be formed from an LCD array or an LED array and focuses theimage on the retina of the user's eyes. The incident and reflectedelectromagnetic radiation 17-3 is generated by the source and detectunit 1-8 located inside the input eye port 7-2 i. The results of thesource and detector 1-8 are part of the accommodation system which isused to measure the accommodation of the right eye so that the image canbe focused to different POD's. In place of the accommodation system, afar/near button 17-7 can be used manually to adjust the focus of theplurality of PODs. A second button (not shown) can be used to adjust forany differences between the left and the right eye. For instance, thefar/near button adjusts the LFP image either towards a POD that isfarther away or nearer for the right eye (assuming the left eye isidentical, then nothing more needs to be done). The second button only“fine” adjusts the far/near for the left eye in case, the left eye isnot the same as the right eye. As the user views the left and right eyeports, the far/near button 17-7 provides a signal to an electronicssystem 20-12 which uses the embedded algorithm to focus the LFP image tovarious PODs. A memory can store the left and the right LFP image fromthe left and the right plenoptic cameras, respectively. The electronicssystem 20-12 extracts the left and the right LFP image from memory andpresents the left and the right LFP image to a left and a right inputeye port, respectively. These images can also be shared with a guest viaa wireless interface. The guest can view the varying focused LFP imageas the user alters the POD. The remote device 8-1 is wirelessly coupledto the Internet, the intranet, the cloud, or any servers that cantransfer data to/from the smart phone 7-3 a. The communication link canbe cellular. Wi-Fi, Bluetooth, or any other known wireless standard thatcan transfer data between two locations. The remote device 8-1 iscoupled to the smart phone 7-3 a. The display screen 7-4 offers a SRstereoscopic 3-D image that can be focused to different PODs for theuser, or a projection system in each of the left and the right input eyeports focuses the left and the right LFP image onto the retina of acorresponding left and right eye ports 7-5 i and 7-2 i to present a LRstereoscopic 3-D image that can be focused to different PODs by theuser. The embedded algorithm applies the time difference in propagationdelay in an electronic system to focus the LFP image from the focusedplane at the first POD to the second unfocused plane of the LFP imageselected from the remaining plurality of PODs. A wireless interfacecouples the focused LFP images at the first POD to a second portablewireless unit. Another projection system in each of the left and theright input eye ports of the second unit projects the focused LFP imagesat the first POD onto the retina of a corresponding left and right eyeof a guest.

FIG. 17B illustrates a smart phone 7-3 a. The smart phone 7-3 acomprises a display screen 7-4, two input eye ports 7-5 i and 7-2 i, andtwo plenoptic cameras on the far side. A user can place their left eye11-5 over the left input eye port 7-5 i and the right eye 11-4 over theright input eye port 7-2 i. The optic axis 17-2 of the right eye 11-4viewing through the right input eye port 7-2 i allows the user to view aFOV 17-4 via a corresponding output eye port (not shown) on the oppositeside of the device 7-3 a and the optic axis 17-6 of the left eye 11-5viewing through the left input eye port 7-5 i allows the user to view aFOV 17-5 via a corresponding output eye port (not shown) on the oppositeside of the device 7-3 a. The FOV can be the LFP images supplied by theplenoptic cameras or the LFP images form memory. The miniature displayscreen can also be formed from an LCD array or an LED array inside theinput eye ports to display the images obtained from the plenopticcameras (not shown) on the back side of the smart phone 7-3 a. Theincident and reflected electromagnetic radiation 17-3 is generated bythe source and detector 1-8 located inside the input eye port 7-5 i. Theresults of the source and detector 1-8 are part of the accommodationsystem which is used to measure the accommodation of the right eye sothat the image can be focused to different POD's. In place of theaccommodation system, the far/near button 17-7 provides a signal to anelectronics system which uses the embedded algorithm to focus the LFPimage to various PODs. As the user views the left and right eye ports,the far/near button can be used focus the LFP image to various PODs.These images can also be shared with a guest via a wireless interface.The display screen 7-4 offers a SR stereoscopic 3-D image that can befocused to different PODs for the user, while the eye ports 7-5 i and7-2 i present a LR stereoscopic 3-D image that can be focused todifferent PODs by the user.

These images in FIG. 17B can be presented to the user in one of severalmodes. One mode is for the plenoptic cameras to capture these images andfeed them directly to the miniature display screen. Another mode is forthe plenoptic cameras to capture these images and store them into memoryto be further processed before presenting them to the miniature displayscreen. For instance, a processor can be used to post-process the imagesbefore presentation, for example, to account for baseline lengthdifferences between the input eye ports and the plenoptic cameras. Yet,another case is to post-process previously captured images that werestored in memory, combine these images with the newly captured images ofthe output eye ports and present the combined image to the miniaturedisplay screen for the user to view. Another mode is to extract and showpreviously captured images or videos from memory and display theseimages on the miniature display screen.

FIG. 18A illustrates an apparatus 18-1 comprising a smart phone 7-3 andtwo attachable units 18-2 and 18-3. The back of the smart phone isindicated (opposite the display screen) but the smart phone can beflipped to show the front side and still be used in the same manner. Theattachable unit 18-2 comprises a plenoptic camera 7-1 and an eye port7-2 while the attachable unit 18-3 comprises a plenoptic camera 7-6 andeye port 7-5. The first attachable unit 18-2 has a first mating surface,the smart phone 7-3 has a plurality of mating surfaces, and the secondattachable unit 18-3 has a second mating surface. The first matingsurface and the second mating surface are coupled to one of theplurality of mating surfaces of the smart phone 7-3. The size of theseattachable units is reduced when compared to the previous attachableunits. At least one of these attachable units comprises a source anddetector unit 1-8, an accommodation test system, and an accommodationsystem. The attachable units are capable of directly communicating withthe remote device 8-1 or indirectly communicating through the smartphone 7-3. The user can look through the eye ports and focus the LFPimage to various POD's since at least one of the attachable unitscomprises a source and detector 1-8 and an accommodation test systemwhich is used to measure the accommodation of the eyes so that the imagecan be focused to different POD's. The remote device 8-1 is wirelesslycoupled to the Internet, the intranet, the cloud, or any servers thatcan transfer data to/from the attachable unit 18-2, 18-3 and the smartphone 7-3. The communication link can be cellular, Wi-Fi, Bluetooth, orany other known wireless standard that can transfer data between twolocations.

FIG. 18B illustrates the system of FIG. 18A with the exception that thatat attachable unit 18-2 has been moved a greater distance than the widthof the smart phone 7-3. This distance is shown as baseline one distanceand offers the ability of the LFP images detected by the plenopticcameras 7-1 in attachable unit 18-2 and 7-6 in attachable unit 18-3 todevelop a larger range of stereoscopic 3-D images that can be focused todifferent PODs for the user. The attachable unit 18-2 has a wirelessinterface to/from the smart phone. The remote device 8-1 in FIG. 18A andFIG. 18B are wirelessly coupled to the Internet, the intranet, thecloud, or any servers that can transfer data to/from the attachableunits 18-2, 18-3, or the smart phone 7-3. The communication link can becellular, Wi-Fi, Bluetooth, or any other known wireless standard thatcan transfer data between two locations. The remote device 8-1 iscoupled to the smart phone 7-3.

FIG. 19A illustrates the system 19-1 of FIG. 18B with the exception thatthat at both attachable units 18-2 and 18-3 has been moved a greaterdistance than the width of the smart phone 7-3. This distance is shownas baseline two distance which is greater than baseline one distance andoffers the ability of the LFP images detected by the plenoptic cameras7-1 and 7-6 to develop an even larger range of stereoscopic 3-D imagesthat can be focused to different PODs for the user. The remote device8-1 is wirelessly coupled to the Internet, the intranet, the cloud, orany servers that can transfer data to/from the attachable units 18-2,18-3, or the smart phone 7-3. The communication link can be cellular,Wi-Fi, Bluetooth, or any other known wireless standard that can transferdata between two locations. The remote device 8-1 is coupled to thesmart phone 7-3. Both attachable units 18-2 and 18-3 are wirelesslycoupled to the smart phone 7-3. The attachable unit 18-2 can communicatevia wireless link 19-2 to the attachable unit 18-3.

FIG. 19B illustrates an apparatus 19-3 where the attachable units 18-2and 18-3 are coupled to an eyeglass frame 19-5. In one case, theattachable unit 18-3 is coupled to the top of the frame 19-5 while theattachable unit 18-2 is flipped and coupled to the front of the frame19-5. The eye port 7-2 overlays the left eye. The incident and reflectedelectromagnetic radiation is generated by a source and detect unit 1-8located inside the input eye port 7-2. The results of the source anddetector 1-8 are part of the accommodation test system which is used tomeasure the accommodation of the left eye and an accommodation system sothat the image can be focused to different POD's. The transparentmaterial 1-19 is coupled to an accommodation system which is used tomeasure the accommodation of the right eye so that the image can befocused to different POD's. This is a potential system for adjustingeach eye individually. The remote device 8-1 is coupled to theeyeglasses 19-3. The communication link 19-4 couples the attachableunits together.

FIG. 20A illustrates a possible block diagram for the smart phone alongwith some components, both internal or external, that perform thefunction of focusing an LFP image to different PODs. The processor 8-3couples to all of the major components presented within the smart phone.A voice recognition 20-1 can detect spoken words or generate spokenwords. An accelerometer 20-2 can be used by the smart phone to determinemovement. A touchscreen 20-3 can be used to enter data into the smartphone. A wireless interface 20-4 interfaces the smart phone to theexternal world by a communication network. A first plenoptic camera 7-1is coupled to the processor, and earphone and speaker 20-5 can be usedto listen privately or listen in a conference mode. A display screen 7-4fills a large portion of one side of the smart phone and this particularportion is where the physical keypad is presented to the user via thetouchscreen 20-3. A bus 20-6 interfaces the processor 8-3 to memory 8-4.It also interfaces to a communication link 20-8 which can be a secondaryway in and out of the chip to the communication network. The memory 8-4can be subdivided into different memories and or located off chipthrough the communication link 20-8. The accommodation test system 20-7a is used to measure the accommodation of the eye so that anaccommodation table can be generated. The accommodation table is used inthe accommodation system 20-7 b to focuses the LFP image to a differentPOD's. A second plenoptic camera 7-6 is coupled to the processor. Thefirst plenoptic camera 7-1 and the second plenoptic camera 7-6 are atthe periphery of one side of the smart phone, preferably near opposingsides of the display screen 7-4. The distance between the firstplenoptic camera 7-1 and the second plenoptic camera 7-6 is called thefirst baseline and additional cameras can be coupled to the processorand placed such that they surround the display screen 7-4 to performadditional features. A first eye port 20-10 can be viewed by the usersince the eye port contains a projection system (LCD, LED, Laserprojection, etc.) that focus the image on the surface of the retina of afirst eye. A second eye port 20-11 can be viewed by the user since theeye port contains a projection system (LCD, LED, Laser projection, etc.)that focus the image on the surface of the retina of a second eye. Oneor both of the eye ports may contain the accommodation test system andaccommodation system to initialize and/or adjust the POD of the capturedLFP image. The computer algorithm is embedded in the electronics system20-12 illustrated in FIG. 21.

FIG. 20B illustrates a possible block diagram for the eyeglasses alongwith some components, both internal or external, that perform thefunction of focusing an LFP image to different PODs. The processor 8-3couples to all of the major components presented within the eyeglasses.A voice recognition 20-1 can detect spoken words or generate spokenwords. An accelerometer 20-2 can be used by the eyeglasses to determinemovement. A wireless interface 20-4 interfaces the eyeglasses to theexternal world by a communication network. A first plenoptic camera 7-1is coupled to the processor, and earphone and speaker 20-5 can be usedto listen privately or listen in a conference mode. The accommodationtest system 20-7 is used to measure the accommodation of the eye. Anaccommodation system (not shown) is used to focus the LFP image todifferent POD's. Lenses 20-9 can be used in the eyeglasses. A bus 20-6interfaces the processor 8-3 to memory 8-4. It also interfaces to acommunication link 20-8 which can be a secondary way in and out of thechip to the communication network. The memory 8-4 can be subdivided intodifferent memories and or located off chip through the communicationlink 20-8. A second plenoptic camera 7-6 is coupled to the processor.The first plenoptic camera 7-1 and the second plenoptic camera 7-6 areat the periphery of one side of the smart phone, preferably nearopposing sides of the display screen 7-4. The distance between the firstplenoptic camera 7-1 and the second plenoptic camera 7-6 is called thebaseline distance and additional cameras can be coupled to the processorand placed such that they surround the display screen 7-4 to performadditional features.

FIG. 21A illustrates a block diagram for an Electronics System 20-12 ina portable wireless unit. The Electronics System 20-12 comprises amemory 8-4 that can be in the portable unit or shared between a remotedevice 8-1 and an Accommodation System 21-1. The Accommodation System21-1 where a flowchart was illustrated in FIG. 6B comprises theAccommodation Test System 20-7 a (a flowchart was illustrated in FIG.6A) and an “Attempt to Focus” block 21-2. This Accommodation System 21-1focuses an LFP image to a different POD by measuring the parameters ofthe eye via the Eye Measuring System 1-33. The Accommodation Test System20-7 a generates the Accommodation Table 6-20 using the EmbeddedAlgorithm 21-3 and the Eye Measuring System 1-33. The Embedded Algorithm21-3 alters the LFP image from a first POD to a second POD. Severaldifferent algorithms are known in the art to perform the embeddedalgorithm. The Eye Measuring System 1-33 uses a source and a detector1-8 of electromagnetic radiation to measure the total flight path of theelectromagnetic radiation propagation. The Embedded Algorithm 21-3 andthe Eye Measuring System 1-33 are used to generate the AccommodationTable 6-20 via the Accommodation Test System 20-7 a. Once theAccommodation Table 6-20 is generated, the Accommodation System 21-1 canbe used to re-focus the LFP image at the original POD into a new LFPimage that is focused at a new POD after the eye Attempts to Focus 21-2on an unfocused plane containing the new LFP image at the new POD. Afar/near button 21-4 is coupled to the electronics system to overridethe eye measuring system 1-33, if used. The far/near button 21-4performs a manual control of the LFP focus.

FIG. 22 illustrates a user using the combination of eyeglasses 11-1 andsmart phone 7-3 with a display screen 7-4 to view an LFP image. Theeyeglasses do not have lens but provide a frame 11-2 to hold thetransparent material 21-6 to probe the user's pupil position and awireless interface 10-10 that couples the eyeglasses of the user to theother apparatus. The display screen 7-4 of the smart phone 7-3 iscoupled to the user's eyeglasses by wireless interconnect 11-10. Theuser's right eye 11-4 views 11-6 the image on the display screen of thewireless unit while the user's left eye 11-5 views 11-7 the image on thedisplay screen 7-4 of the wireless unit 7-3. The glasses contained aframe 11-2 with a nose rest 11-3 and arms 10-5 and 10-6 when open areperpendicular to plane comprising 11-2. An assembly in the arm 10-5comprises the electronics to operate the glasses, the camera, theremaining portion of the pupil location system, a speaker and earphone(not illustrated), a module for voice recognition, and voice generation.On the frame 11-2 is a plenoptic camera 7-1 and a transparent bar 22-6.The remote device 8-1 can be the Internet, the intranet, the cloud, orany servers that can transfer data to/from the eyeglasses 1-1.

This system uses a voluntary procedure to adjust the focus of the PODfor an LFP image of one or more plenoptic cameras. In this case, the EyeMeasuring System 1-33 of the accommodation system is not used insteadthe transparent material 22-6 has a detector which follows the pupil ofthe eye. This system can be used in place of the Eye Measuring System1-33. The user focus the POD of an LFP image by shifting their eyequickly from the optical axis starting point in one direction and returnquickly in the opposite direction back to the optic axis starting pointin under a second. An example is illustrated by the arrows 22-1 and22-2. When the right 11-4 eye moves to the right 22-2 quickly andreturns 22-2, the POD focus move toward the user. When the right 11-4eye moves to the left 22-3 quickly and returns 22-4, the POD focus moveaway from the user. The table in 22-5 presents a tabulated form of thecontrol described above. Also possible is for the eye to move in thevertical directions instead of the horizontal directions to adjust thefocus of the LFP image.

Finally, it is understood that the above description are onlyillustrative of the principles of the current invention. It isunderstood that the various embodiments of the invention, althoughdifferent, are not mutually exclusive. In accordance with theseprinciples, those skilled in the an may devise numerous modificationswithout departing from the spirit and scope of the invention. Althoughthe portable aspect of the wireless system has been presented, the sametechniques can be incorporated in non-portable systems therein. Thecamera could be a still image camera taking single pictures or a videocamera taking multiple pictures per second proving the illusion ofcontinuous motion when replaced to a user therewith. A camera iscomprises a single main lens focused on an image sensor. A camera can beas simple as a pinhole and an image sensor. A plenoptic camera comprisesof an array of microlenses is placed at the focal plane of the cameramain lens. The image sensor is positioned slightly behind themicrolenses. Thus, a plenoptic camera is a camera with an array ofmicrolenses between the main lens and the image sensor. A plenopticcamera can be as simple as an array of microlenses and at least oneimage sensor. A smart phone is discussed and described in thisspeciation; however, the smart phone can imply any portable wirelessunit such as a tablet, smart phone, eyeglass, notebook, cameras, etc.that are portable and wireless coupled to a communication system. Whenan image is described as being used in the system, there is norestriction that only images can be used, instead videos can also bepresented. Particularly since a video is made up of many images eachshown for a fraction of a second. In some cases, the portable wirelessunit may not, in fact, be portable, for example, an airport scanner. Theprocessor comprises a CPU (Central Processing Unit), microprocessor,DSP, Network processor, video processor, a front end processor,multi-core processor, or a co-processor. All of the supporting elementsto operate these processors (memory, disks, monitors, keyboards, etc.)although not necessarily shown are known by those skilled in the art forthe operation of the entire system. In addition, other communicationtechniques can be used to send the information between all links such asTDMA (Time Division Multiple Access), FDMA (Frequency Division MultipleAccess), CDMA (Code Division Multiple Access), OFDM (OrthogonalFrequency Division Multiplexing), UWB (Ultra Wide Band), WiFi, etc.

What is claimed is:
 1. A time difference apparatus comprising: aplurality of Plane of Depths (PODs) in an Light Field Photograph (LFP)image; a first thickness of a crystalline lens of an eye focused on afirst plane at a first POD; an electromagnetic radiation propagatesthrough the first thickness in a first measured delay time; wherein thecrystalline lens of the eye varies to a second thickness when attemptingto focus on a second unfocused plane selected from the remainingplurality of PODs; the electromagnetic radiation propagates through thesecond thickness in a second measured time; and a time difference inpropagation delay between the first measured delay time and the secondmeasured delay time indicates a POD variation.
 2. The apparatus of claim1, further comprising: a laser to generate the electromagneticradiation.
 3. The apparatus of claim 1, further comprising: at least oneSchottky diode configured to detect the time difference in thepropagation delay between the first measured delay time and the secondmeasured delay time.
 4. The apparatus of claim 1, wherein the LFP imagepresents the focused plane at the first POD and presents as plurality ofunfocused planes from the plurality of PODs that remain.
 5. Theapparatus of claim 1, further comprising: an algorithm stored in memoryapplies the time difference to an image processing system configured tofocus the LFP image of the second unfocused plane into focus bycompensating for the POD variation.
 6. The apparatus of claim 1, furthercomprising: an eyeglass image generated by an eyeglass presents thefocused plane at the first POD and the second unfocused plane at thesecond POD.
 7. The apparatus of claim 6, further comprising: analgorithm stored in memory applies the POD variation to a mechanicalsystem configured to bring the second unfocused plane at of the eyeglassimage into focus.
 8. A time difference apparatus comprising: a pluralityof Plane of Depths (PODs) in an Light Field Photograph (LFP) image; afirst plane at a first POD is in focus, wherein a crystalline lens of aneye is characterized by a first thickness; an electromagnetic radiationpropagates through the first thickness in a first delay time, wherein asecond unfocused plane selected from the remaining plurality of PODsbecomes focused by adjusting the crystalline lens of the eye to a secondthickness; the electromagnetic, radiation propagates through the secondthickness in a second delay time; and a time difference in propagationdelay between the first delay time and the second delay time, whereinthe time difference corresponds to a depth variation between the firstplane and the unfocused plane.
 9. The apparatus of claim 8, furthercomprising: a laser to generate the electromagnetic radiation.
 10. Theapparatus of claim 8, further comprising: at least one Schottky diodeconfigured to detect the time difference in propagation delay betweenthe first delay time and the second delay time.
 11. The apparatus ofclaim 8, wherein the LFP image presents the focused plane at the firstPOD and presents a plurality of unfocused planes from the plurality ofPODs that remain.
 12. The apparatus of claim 11, farther comprising: analgorithm stored in memory configured to apply the time difference inthe propagation delay to an image processing system configured to focusthe LFP image from the focused plane at the first POD to the secondunfocused plane of the LFP image selected from the remaining pluralityof PODs.
 13. The apparatus of claim 8, further comprising: an eyeglass,a lens of the eyeglass presents an image of the focused plane at thefirst POD and the second unfocused plane selected from the remainingplurality of PODs.
 14. The apparatus of claim 13, further comprising: analgorithm stored in memory configured to apply the depth variation dueto the propagation delay to a mechanical system, the mechanical systemconfigured to bring the image due to the lens of the eyeglass intofocus.
 15. A time difference apparatus comprising: a plurality of Planeof Depths (PODs) in an Light Field Photograph (UP) image; a first planeat a first POD is in focus, wherein a lens configured to present theimage is at a first thickness; a first delay time, wherein the firsttime delay is for an electromagnetic radiation to propagate through thelens; a second plane selected from the remaining plurality of PODs,wherein the lens is configured to adjust to a second thickness; theelectromagnetic radiation propagates through the lens in a second delaytime; and a time difference in propagation delay between the first delaytime and the second delay time, wherein the time difference correspondsto a lens thickness variation.
 16. The apparatus of claim 15, furthercomprising: a laser to generate the electromagnetic radiation.
 17. Theapparatus of claim 15, further comprising: at least one Schottky diodeconfigured to detect the time difference in the propagation delaybetween the first delay time and the second delay time.
 18. Theapparatus of claim 15, further comprising: the LFP image presents thefocused plane at the first POD and presents a plurality of unfocusedplanes from the plurality of PODs that remain.
 19. The apparatus ofclaim 15, farther comprising: an algorithm stored in memory configuredto apply the time difference to an image processing system, the imageprocessing system configured to focus the LFP image of the secondunfocused plane into focus by compensating for the lens thicknessvariation.
 20. The apparatus of claim 15, further comprising: aneyeglass, the eyeglass presents an image of the focused plane at thefirst POD and the second unfocused plane at the second POD.
 21. Theapparatus of claim 20, further comprising: an algorithm stored in memoryconfigured to apply the lens thickness variation to a mechanical system,the mechanical system configured to bring the second unfocused planeinto focus by an adjustment of the lens according to the lens thicknessvariation.